PHP 中的 SHA1WithRSA

最近和java对接接口看文档就是rsa 一开始怎么也调不通；觉得就是rsa 加密一把 他们只给一个key 一个字符串

MIIBVAIBADxxxxxxxEAAkEApWBS7aJbksmufLQZ889vhw5Uy93xGOqe3/YS5/trqgDMA9iZKNxttyBnU7ffj0c3bas7jUklZRnGlO7Tb+Aa8QIDAQABAkBeA7GBSKB4hVE9sYFjepSzmbEZKLYsbQ0e0xySZvsg7GMJFjFAbcFaqD7W4bFbG34QKvrEELbmRyxxxxx0yApG/yJPJlCXzN5Iaavcszx1al7mKPK8PECIQDIhtVhmgYEIM3W/TxxxxxxxxxxxxxJZ38VSU42phAEDBeq59IKkc15hyBQSgXnuM0x2yfszBAiBjS4D155L7ExxxxVhU/F/lMD7oOGoAQIgEM5LXv1q8Suf1oIDetZB4T7jMQ4vgRpQfR0g8YEFR/Y=

我就简单的调用

$pu_key = openssl_pkey_get_private($interface_key); 会报错 // openssl_pkey_get_private(): key param is not a valid private key
var_dump($pu_key)
openssl_private_encrypt($sign, $resSign, $pu_key);

其实正规生成的pem 文件格式确实不和前面同样；最后让java给一个java的demo 最后看到SHA1WithRSA 就网上搜了一下php的实现

<?php
//生成 sha1WithRSA 签名 
function genSign($toSign, $privateKey){
	//这里他是拼接成和pem文件同样的格式
    $privateKey = "-----BEGIN RSA PRIVATE KEY-----\n" .
        wordwrap($privateKey, 64, "\n", true) .
        "\n-----END RSA PRIVATE KEY-----";

    $key = openssl_get_privatekey($privateKey);
    openssl_sign($toSign, $signature, $key);
    openssl_free_key($key);
    $sign = base64_encode($signature);
    return $sign;
}

//校验 sha1WithRSA 签名
function verifySign($data, $sign, $pubKey){
    $sign = base64_decode($sign);

    $pubKey = "-----BEGIN PUBLIC KEY-----\n" .
                wordwrap($pubKey, 64, "\n", true) .
                "\n-----END PUBLIC KEY-----";

    $key = openssl_pkey_get_public($pubKey);
    $result = openssl_verify($data, $sign, $key, OPENSSL_ALGO_SHA1) === 1;
    return $result;
}

//测试
$privateKey = "xx....";
$pubKey = "xxx....";

//生成签名
$sign = genSign("test", $privateKey);
//校验签名
$rs = verifySign("test", $sign, $pubKey);
var_dump($rs);

来源